print('I\'m ok.')
# I'm ok.
print('I\'m learning\nPython.')
# I'm learning
# Python.
print('\\\n\\')
# \
# \


# ===================
# 多行字符串'''...'''还可以在前面加上r使用

print('''line1
line2
line3''')

print(r'''hello,\n
world''')


# ===================

n = 123
print(n)
f = 456.789
print(f)
s1 = 'Hello, world'
print(s1)
s2 = 'Hello, \'Adam\''
print(s2)
s3 = r'Hello, "Bart"'
print(s3)
s4 = r'''Hello,
Lisa!'''
print(s4)